To skip the screen which forces the user to login with matched account while autoaccountlink

[Veeraj1996]

Here is what i achieved which discussed in #321 (comment)

1. User sign in with FB
2. FB email matches an account in B2C directory
3. Present screen which forces the user to login with matched account using any one of the IdPs detected on that account (maybe
   Local and Google are registered already to it). We do this by analyzing the identities collection on the account.
   4 If the user manages to login to this account, then link FB to it.
   5 Now the account has FB, Google and Local identities.

But I want to skip the 3 stop where user should be automatically linked to matched account instead prompting to signin again.
Also expecting consequences if I do so.

Please help me to do so. Thanks in advance